Freefall in Crimson

This time out, McGee came close to losing his status as a living legend when he agreed to track down the killers who brutally murdered an ailing millionaire. For starters, he renewed an unfinished adventure with a famous--and oversexed--Hollywood actress, who led him into a very nasty nest of murderers involving a motorcycle gang, pornographic movies, and mad balloonists. And Mcgee relearned the old lesson--that only when he came close to the edge of death was he completely alive.

The Secret Agent by Joseph Conrad
The novel is set in London in 1886 and follows the life of Mr. Verloc, a secret agent. Verloc is also a businessman who owns a shop which sells pornographic material, contraceptives, and bric-a-brac. He lives with his wife Winnie, his mother-in-law, and his brother-in-law, Stevie.